Disappointing #'s?

Sounds like it runs pretty good. Your car runs about what i would expect considering the mods. Your build sounds like it is built pretty much like a stock six pack motor with a hotter cam and pocket ported heads. A factory 6 pack was rated at 385-390 hp depending on year. Now consider for a moment that when the factory dynoed an engine, it was with open exhaust, no air cleaner, no fan, no alternator and with the numbers "corrected" for temperture and altitude. Everything was optimized. Now put that same engine in a car with all accessories hooked up , running through an exhaust system and breathing hot underhood air, and i could imagine it might lose 40-50 hp. In short, if you are making close to 400 at the crank you are doing alright.